It is indeed a reflection so you would think that the writing should be reversed but the Tardis itself has translated the words for you so if it seems wrong it's just the Tardis translating for us. Simples.

it's possible that they are inside the astronaut which would explain the writing being the right way, also there is no fish eye, also on an unrelated topic (i'm sure everyone has already noticed) but the lightning in the vortex that his the vortex is the same as the electricity that shoots from the silence/silents